/* 시니어 친화 도형매칭 스타일 리뉴얼 */
:root {
    --primary-color: #1976d2;
    --primary-color-dark: #0d47a1;
    --accent-color: #ff9800;
    --success-color: #43a047;
    --danger-color: #e53935;
    --text-color: #222;
    --border-radius: 18px;
    --box-shadow: 0 4px 24px rgba(25, 118, 210, 0.08);
    --transition: all 0.2s cubic-bezier(.4,2,.3,1);
}

body {
    font-size: 1.18rem;
    background: #f4f6fa;
    color: var(--text-color);
}

.exercise-container {
    background-color: #fff;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    padding: 2.5rem 2rem;
    margin-bottom: 2rem;
    border: 3px solid #1976d2;
}

.exercise-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1.2rem;
    border-bottom: 2px solid #1976d2;
    font-size: 1.25rem;
}

.level-selector label {
    margin-right: 0.7rem;
    color: var(--primary-color-dark);
    font-weight: 700;
    font-size: 1.1em;
}

.level-selector select {
    padding: 0.6rem 1.2rem;
    border-radius: var(--border-radius);
    border: 2px solid #1976d2;
    background-color: #e3f2fd;
    color: var(--primary-color-dark);
    font-size: 1.1em;
    font-weight: 600;
}

.timer {
    font-size: 2.1rem;
    font-weight: bold;
    color: var(--accent-color);
    letter-spacing: 2px;
    text-shadow: 1px 1px 0 #fff, 0 2px 8px #1976d233;
}

.score-display {
    background-color: var(--success-color);
    color: #fff;
    padding: 0.7rem 2.2rem;
    border-radius: 30px;
    font-weight: bold;
    font-size: 1.3rem;
    box-shadow: 0 2px 8px #43a04733;
    border: 2px solid #388e3c;
}

.canvas-container {
    display: flex;
    justify-content: center;
    margin: 0 auto;
    max-width: 900px;
    border: 4px solid #1976d2;
    border-radius: 24px;
    overflow: hidden;
    margin-bottom: 2rem;
    background: #e3f2fd;
    touch-action: none;
}

.canvas-container canvas {
    max-width: 100%;
    height: auto;
    user-select: none;
    background: #fff;
    border-radius: 12px;
    border: 2px solid #1976d2;
}

.control-buttons {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.btn-primary, .btn-secondary {
    display: inline-block;
    font-size: 1.25rem;
    font-weight: 700;
    padding: 1.1rem 2.5rem;
    border-radius: 30px;
    border: 2px solid #1976d2;
    box-shadow: 0 2px 12px #1976d233;
    transition: var(--transition);
    outline: none;
    cursor: pointer;
}

.btn-primary {
    background: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

.btn-primary:hover, .btn-primary:focus {
    background: var(--primary-color-dark);
    border-color: var(--primary-color-dark);
}

.btn-secondary {
    background: #fff;
    color: var(--primary-color-dark);
    border-color: var(--primary-color);
}

.btn-secondary:hover, .btn-secondary:focus {
    background: #e3f2fd;
    color: #1976d2;
    border-color: #1976d2;
}

.btn-secondary:disabled, .btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.exercise-instructions {
    background-color: #e3f2fd;
    padding: 2rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 1.15rem;
    margin-top: 1.5rem;
    border: 2px solid #1976d2;
}

.exercise-instructions h3 {
    color: var(--primary-color-dark);
    margin-bottom: 1.2rem;
    font-size: 1.3em;
}

.exercise-instructions ol {
    padding-left: 2rem;
}

.exercise-instructions li {
    margin-bottom: 1.1rem;
    color: var(--text-color);
    line-height: 1.7;
    font-size: 1.08em;
}

/* 모달 스타일 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(25, 118, 210, 0.18);
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: #fff;
    padding: 2.5rem 2rem;
    border-radius: 24px;
    width: 95%;
    max-width: 520px;
    box-shadow: 0 8px 32px #1976d233;
    text-align: center;
    position: relative;
    border: 3px solid #1976d2;
}

.close-btn {
    position: absolute;
    top: 18px;
    right: 24px;
    font-size: 2.2rem;
    cursor: pointer;
    color: #aaa;
    background: none;
    border: none;
    transition: color 0.2s;
}
.close-btn:hover {
    color: var(--danger-color);
}

#modalTitle {
    color: var(--primary-color);
    margin-bottom: 1.2rem;
    font-size: 2rem;
    font-weight: 700;
}

#modalMessage {
    color: var(--text-color);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 1.15em;
}

#modalScore {
    font-size: 2.2rem;
    font-weight: bold;
    color: var(--success-color);
    margin-bottom: 1.5rem;
    text-shadow: 0 2px 8px #43a04733;
}

.page-header .title {
    font-size: 2.5rem;
    color: #1976d2;
    font-weight: 800;
    margin-bottom: 0.5rem;
}
.page-header .subtitle {
    color: #333;
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.page-navigation {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-top: 2.5rem;
}

.nav-btn {
    background: #fff;
    color: #1976d2;
    border: 2px solid #1976d2;
    border-radius: 30px;
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 2px 8px #1976d233;
    transition: var(--transition);
}
.nav-btn:hover {
    background: #1976d2;
    color: #fff;
}

@media (max-width: 900px) {
    .canvas-container {
        max-width: 100%;
    }
}
@media (max-width: 768px) {
    .exercise-container {
        padding: 1.2rem 0.5rem;
    }
    .canvas-container {
        border-width: 2px;
        border-radius: 12px;
    }
    .modal-content {
        padding: 1.2rem 0.5rem;
        border-radius: 12px;
    }
    .page-header .title {
        font-size: 1.5rem;
    }
}